Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3475
Título: Evaluation of distinct input methods of an intelligent wheelchair in simulated and real environments: a performance and usability study
Autor: Faria, Brígida Mónica
Vasconcelos, Sérgio
Reis, Luís Paulo
Lau, Nuno
Palavras-chave: Intelligent wheelchair
Multimodal interface
Powered wheelchairs
Assistive robotics
Assistive technology
Human-machine interface
Data: 2013
Editora: Taylor & Francis
Relatório da Série N.º: Assistive Technology: The Official Journal of RESNA; Vol. 25, Nº 2
Resumo: This paper focuses on evaluating the usability of an Intelligent Wheelchair (IW) in both real and simulated environments. The wheelchair is controlled at a high-level by a flexible multimodal interface, using voice commands, facial expressions, head movements and joystick as its main inputs. A Quasi-experimental design was applied including a deterministic sample with a questionnaire that enabled to apply the System Usability Scale. The subjects were divided in two independent samples: 46 individuals performing the experiment with an Intelligent Wheelchair in a simulated environment (28 using different commands in a sequential way and 18 with the liberty to choose the command); 12 individuals performing the experiment with a real IW. The main conclusion achieved by this study is that the usability of the Intelligent Wheelchair in a real environment is higher than in the simulated environment. However there were not statistical evidences to affirm that there are differences between the real and simulated wheelchairs in terms of safety and control. Also, most of users considered the multimodal way of driving the wheelchair very practical and satisfactory. Thus, it may be concluded that the multimodal interfaces enables very easy and safe control of the IW both in simulated and real environments.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3475
ISSN: 1040-0435
Versão do Editor: http://www.tandfonline.com/doi/full/10.1080/10400435.2012.723297#.UuefW0qp1dg
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